The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Dead-time effect of dual active bridge (DAB) DC-DC converter is usually out of consideration in traditional optimized strategies, causing the deviation of the theoretical and actual results. In this paper, the current stress model of DAB with dead-time effect is given, and combining the transmission power model, a current-stress-optimized strategy is proposed. Meanwhile, the corresponding control...
This paper first investigates the challenging graph theoretic problem of constructing universally rigid tensegrity frameworks given any generic configuration. We design a numerical algorithm to construct a universally rigid tensegrity framework, such that the resulted eigenvalues of the stress matrix of the tensegrity framework can be selected beforehand. As one application, we then consider the formation...
Under the same nitridation annealing treatment, the device performance for the lower nitrogen concentration in high-k dielectric treatment seems better than that with the higher one. In this stress test combining the recovery test, the recovery efficiency and the degradation rate in lower N2 concentration is more impressive than that with higher one, too. These results demonstrate the adequate N2...
Stress of foundation pile is more sensitive than the other monitoring indexes such as displacement, so it can be observed to show run behavior more efficaciously. Stress components must be separated by influence factors, and stress monitoring model can be built by the relationship of stress components and their influence factors. Wavelet shows good characteristics in time-frequency domain, so it has...
The settlement behavior of pile foundation is an important index for construction and design especially for bridges built on poor hydrologic and geologic conditions. Because the main of Sutong Bridge is situated in the tideway of Yangtze River, the maximum variable load caused by tidal range is about 224MN. It acts on pile foundation circularly, and affects the settlement of the pile group foundation...
The settlement behavior of pile foundations is an important index for construction control and design verification especially for bridges built on poor hydrologic and geologic conditions. Settlement calculation methods are appraised firstly. Considering engineering conditions and characteristics of pile foundations of the two main piers in the Sutong Bridge, Improved Equivalent Pier Method (IEPM)...
With the high development of the motor industry, there is a great demand for precise and complex auto parts. New forging processes, material and energy saving processes are very important to the production of new type of auto parts. But forging mechanism is very complicated,and numerical simulation is the most effective method for analyzing the plastic deformation process. In this paper, several key...
Real time, in situ, and ex situ spectroscopic ellipsometry (SE) methods have been applied in systematic studies of the structure and optical properties of polycrystalline CdTe and CdS thin films deposited by rf magnetron sputtering. The goal of this ongoing research is to establish a basic understanding of the relationships between the physical and optical properties, including how the void fraction,...
A novel dual-boost half-bridge (DBHB) reversible pulse width modulation (PWM) rectifier is proposed in this paper. Compared with the conventional full-bridge or half-bridge reversible PWM rectifier, the proposed DBHB rectifier exhibits two distinct advantages: (a) No power switches are connected in series directly in one leg, and the operation reliability is greatly improved for its inherent immunity...
Real time spectroscopic ellipsometry (RTSE) has been applied to study the magnetron sputter deposition of polycrystalline CdTe and CdS thin films on crystalline silicon wafer substrates held at different temperatures (Ts). The broadening parameters Γn of the dielectric function critical points (CPs) measured at room temperature for the CdS and CdTe films show variations with Ts, from which the group...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.